C-M5

Melting point / freezing point

Administrative data

Endpoint:

melting point/freezing point

Type of information:

experimental study

Adequacy of study:

key study

Study period:

Testing was conducted between 28 March 2007 and 28 April 2007.

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

other: Study conducted to GLP and in compliance with agreed protocols, with no or minor deviations from standard test guidelines and/or minor methodological deficiencies, which do no effect the quality of the relevant results.

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

2007

Report date:

2007

Materials and methods

Test guideline

Qualifier:

according to guideline

Guideline:

EU Method A.1 (Melting / Freezing Temperature)

Deviations:

no

GLP compliance:

yes (incl. QA statement)

Type of method:

other: Differential Scanning Calorimetry (DSC)

Test material

Reference

Name:

Unnamed

Type:

Constituent

Test material form:

solid: particulate/powder

Remarks:

migrated information: powder

Results and discussion

Melting / freezing point

Decomposition:

yes

Decomp. temp.:

ca. 573 K

Sublimation:

no

Remarks on result:

other: As the test material decomposed, no value of melting temperature could be determined.

Any other information on results incl. tables

Results

Thermographic data for Determinations 1 and 2 are shown in the following tables respectively.

Thermographic Data - Determination 1

Thermal Event	Interpretation	Temperature
		ºC	K
Exotherm	Onset of decomposition	300	573
	Extrapolated onset of decomposition	309	582
	Peak decomposition	326	599

Thermographic Data - Determination 2

Thermal Event	Interpretation	Temperature
		ºC	K
Exotherm	Onset of decomposition	300	573
	Extrapolated onset of decomposition	307	580
	Peak decomposition	324	597

Overall result:   Decomposed from approximately 573 K

Discussion

As a result of the low rate of enthalpy change during decomposition, the onset temperature can only be approximated.

Non-similar thermographic profiles were obtained using air and nitrogen atmospheres; this indicates that the observed decomposition in the air determinations is mainly oxidative.

Conclusion

The test material has been determined to decompose from approximately 573 K.  As the test material decomposed, no value of melting temperature could be determined.

Applicant's summary and conclusion

Conclusions:

The test material has been determined to decompose from approximately 573 K. As the test material decomposed, no value of melting temperature could be determined.

Executive summary:

The determination for substance CM-5 in project number 0345 -0889 was carried out by differential scanning calorimetry (DSC) using the procedure specified in ASTM E537-86, Method A1 of Commission Directive 92/69/EEC (which constitutes Annex V of Council Directive 67/548/EEC), Method 102 of the OECD Guidelines for Testing of Chemicals, 27 July 1995.

The test material has been determined to decompose from approximately 573 K. As the test material decomposed, no value of melting temperature could be determined.